The structure of the atom
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ELECTRON Negative. NEUTRON No Charge. PROTON Positive. Simple Atomic Structure. The structure of the atom. Two positive protons and two negative electrons. Gain an electron to become negative. Lose an electron to become positive. More free powerpoints at http://www.worldofteaching.com.

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The structure of the atom

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ELECTRON

Negative

NEUTRON

No Charge

PROTON

Positive

Simple Atomic Structure

The structure of the atom

Two positive protons and two negative electrons

Gain an electron to become negative

Lose an electron to become positive

More free powerpoints athttp://www.worldofteaching.com


+

-

-

+

Charging Up Rods

It’s all about moving electrons

Acetate positive

Polythene Negative

Cloth Negative

Cloth Positive

+

+

Acetate

-

-

Polythene

+

+

+

-

-

-

+

+

-

+

-

-


-

-

+

+

+

-

-

+

+

+

+

+

+

-

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Bringing Charges Together

Attract

Repel

Repel


Positive Plate

Negative Plate

The Electric Field

This is a region where a charge experiences a force

The field is from + to -

Neutral Point


+

+

+

The Gold Leaf Electroscope


-

-

-


The Test for Charge

+

+

+

+

+

+

Build up of negative charge on this side

The positive rod attracts the balloon

NO

So the balloon must be negative

The balloon is uncharged


+

+

+

-

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The Test for Charge is Repulsion

This balloon must be negative

This balloon must be positive


Uses of Static Electricity

Spraying a Car

Positive Car

Negative Spraygun

The paint spreads out as each negative drop repels

No paint is wasted as the positive car attracts the negative paint


Removing Smoke from Power Station Chimnies

No smoke leaves the chimney

Positive Plate

Negative Plate

Charge up the Smoke


Earthing Petrol Tankers

Petrol rubbing against the pipe can build up a static charge which could cause an explosion

The tanker is joined to the ground with a wire to stop a charge building up


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